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Head-to-head · every figure from the vendor documents

Dell R7715 vs Lenovo SR655 V3

A specification-by-specification comparison of the Dell PowerEdge R7715 and the Lenovo ThinkSystem SR655 V3, built from Dell’s and Lenovo’s own documents. 2 headline measures favour the R7715, 1 favours the SR655 V3, and 18 processors appear in both lists.

Bottom line. R7715 leads on virtualisation, databases and in-memory work. SR655 V3 leads on AI and acceleration. Neither vendor publishes benchmarks for these machines, so every call here is made on what their documents state.

Dell PowerEdge R7715 2U front with 40 EDSFF E3.S NVMe drive bays in five groups of eight between the left and right control panels
Dell PowerEdge
R7715
2U Rack1 socket24 DIMMiDRAC10
Configure the R7715 →Full data sheet
VS
Lenovo ThinkSystem SR655 V3 2U chassis from the front: 24 numbered 2.5-inch hot-swap bays, VGA port on the left, USB ports on the right
Lenovo ThinkSystem
SR655 V3
2U Rack1 socket12 DIMMXClarity Controller 2
Configure the SR655 V3 →Full data sheet
01 — Scoreboard

The measures that decide it

Each row is a figure both vendors publish. Bars show the split between the two; a badge marks the larger figure, which is not always the better buy — a shallower chassis or a lower power ceiling can matter more.

1
Processor sockets
1
160
Cores, fully populated
Largest listed processor × its socket count
160
6 TBHigher
Memory ceiling
As each document states it
3 TB
40
Drive bays
40
Up to 6
Accelerators
HigherUp to 8
3,200 WHigher
Largest power supply
2,600 W
2U Rack
Rack height
2U Rack
400 GbE class
Fastest network option
400 GbE class
02 — Verdict

Which one, and why

Drawn from the measures above and each model’s own data sheet. Neither vendor publishes benchmark results for these servers, so nothing here claims one is “faster”.

Choose the R7715 if…

  • Memory ceiling: 6 TB against 3 TB on the SR655 V3
  • Largest power supply: 3,200 W against 2,600 W on the SR655 V3
  • Eight x16 Gen5 slots on one EPYC 9005 socket — twice the four Gen5 slots of the R7615 it succeeds.

Choose the SR655 V3 if…

  • Accelerators: Up to 8 against Up to 6 on the R7715
  • A whole 2U storage chassis on one processor: drive bays at the front, in the middle and at the rear reach 40 × 2.5-inch or 20 × 3.5-inch, and up to 32 of the 2.5-inch bays can be NVMe through switch adapters, or 24 when each drive needs its own x4 link.
03 — By workload

Where each one pulls ahead

Calls made on documented capacity only — cores, memory, bays, accelerators and network options — with the figures behind each one shown.

VirtualisationR7715: 160 cores with 6 TB. SR655 V3: 160 cores with 3 TB.R7715
Databases & in-memoryMemory ceiling 6 TB against 3 TB, across 24 and 12 DIMM slots.R7715
Storage density40 bays in 2U against 40 in 2U.Line ball
AI & acceleration6 accelerators against 8 in the vendor documents.SR655 V3
Network throughputFastest card listed: 400 GbE class against 400 GbE class.Line ball
04 — Specifications

Side by side, differences first

Everything both documents state, grouped. The default view hides rows where the two machines are identical.

Processors

Every processor each vendor lists for the model, from its own document.

SpecificationR7715SR655 V3
Processors listed1845
Processor familiesAMD EPYC 9005AMD EPYC 9005 · AMD EPYC 9004

Memory

SpecificationR7715SR655 V3
DIMM slots2412
Slots per processor2412
Memory typesRDIMM DDR5-6400 (runs at 5200 MT/s 1DPC / 4400-4000 MT/s 2DPC)RDIMM DDR5-6400 (5th Gen EPYC) · RDIMM DDR5-4800 (4th Gen EPYC) · 9x4 RDIMM · 3DS RDIMM DDR5-6400

Storage

Bay counts are the maximum each document states, including rear and mid-chassis positions.

SpecificationR7715SR655 V3
Documented layouts1024
Bay sizes2.5-inch · E3.S · 3.5-inch3.5-inch · 2.5-inch
Boot devicesBOSS-N1 DC-MHS (rear; RAID 0/1, 2 x M.2 NVMe 480 GB or 960 GB read-intensive)M.2 SATA/NVMe 2-Bay Enablement Kit (4Y37A09738) · M.2 SATA/x4 NVMe 2-Bay Adapter (4Y37A79663) · M.2 NVMe 2-Bay RAID Adapter (4Y37A09750) + 1 more
Storage controllers522

Accelerators & I/O

SpecificationR7715SR655 V3
Accelerators supportedUp to 6Up to 8
Double-wide cards listed47
OCP slots21
PCIe network slots810
Network cards listed1632

Power & platform

SpecificationR7715SR655 V3
Power-supply options1110
Output range800–3,200 W750–2,600 W
Input typesAC · 277 VAC / HVDCAC · −48 V DC
ManagementiDRAC10XClarity Controller 2
Chassis depthVendors measure depth differently — see each data sheet802.4 mm with PSU handle766 mm
05 — The data

Processors, memory, bays and power

The same charts each data sheet carries, drawn to the same scale so the two ranges can be read against each other.

R7715: processors by cores and TDP

Dell PowerEdge R7715 processors081624324048566472808896104112120128136144152160100 W150 W200 W250 W300 W350 W400 WCores per processorAMD EPYC 9845 — 160 cores / 320 threads · 390 W · 2.1 GHz base · 320 MB cache · DDR5-6400AMD EPYC 9825 — 144 cores / 288 threads · 390 W · 2.2 GHz base · 384 MB cache · DDR5-6400AMD EPYC 9745 — 128 cores / 256 threads · 400 W · 2.4 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9655P — 96 cores / 192 threads · 400 W · 2.6 GHz base · 384 MB cache · DDR5-6400AMD EPYC 9575F — 64 cores / 128 threads · 400 W · 3.3 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9555P — 64 cores / 128 threads · 360 W · 3.2 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9535 — 64 cores / 128 threads · 300 W · 256 MB cache · DDR5-6000AMD EPYC 9475F — 48 cores / 96 threads · 400 W · 3.65 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9455 — 48 cores / 96 threads · 300 W · 256 MB cache · DDR5-6000AMD EPYC 9375F — 32 cores / 64 threads · 320 W · 3.8 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9355P — 32 cores / 64 threads · 280 W · 3.55 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9335 — 32 cores / 64 threads · 210 W · 3 GHz base · 128 MB cache · DDR5-6400AMD EPYC 9275F — 24 cores / 48 threads · 320 W · 4.1 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9255 — 24 cores / 48 threads · 200 W · 3.2 GHz base · 128 MB cache · DDR5-6400AMD EPYC 9175F — 16 cores / 32 threads · 320 W · 4.2 GHz base · 512 MB cache · DDR5-6400AMD EPYC 9135 — 16 cores / 32 threads · 200 W · 3.65 GHz base · 64 MB cache · DDR5-6400AMD EPYC 9115 — 16 cores / 32 threads · 125 W · 2.6 GHz base · 64 MB cache · DDR5-6400AMD EPYC 9015 — 8 cores / 16 threads · 125 W · 3.6 GHz base · 64 MB cache · DDR5-6400EPYC 9845160 cores · 2.4 W/core — top SKU and most efficient
AMD EPYC 9005 18Bubble size = L3 cache · hover a bubble for the full SKU

SR655 V3: processors by cores and TDP

Lenovo ThinkSystem SR655 V3 processors081624324048566472808896104112120128136144152160100 W150 W200 W250 W300 W350 W400 WCores per processorAMD EPYC 9845 — 160 cores / 320 threads · 390 W · 2.1 GHz base · 320 MB cache · DDR5-6400AMD EPYC 9825 — 144 cores / 288 threads · 390 W · 2.2 GHz base · 384 MB cache · DDR5-6400AMD EPYC 9745 — 128 cores / 256 threads · 400 W · 2.4 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9655 — 96 cores / 192 threads · 400 W · 2.6 GHz base · 384 MB cache · DDR5-6400AMD EPYC 9655P — 96 cores / 192 threads · 400 W · 2.6 GHz base · 384 MB cache · DDR5-6400AMD EPYC 9645 — 96 cores / 192 threads · 320 W · 2.3 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9565 — 72 cores / 144 threads · 400 W · 3.15 GHz base · 384 MB cache · DDR5-6400AMD EPYC 9575F — 64 cores / 128 threads · 400 W · 3.3 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9555 — 64 cores / 128 threads · 360 W · 3.2 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9555P — 64 cores / 128 threads · 360 W · 3.2 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9535 — 64 cores / 128 threads · 300 W · 2.4 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9475F — 48 cores / 96 threads · 400 W · 3.65 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9455 — 48 cores / 96 threads · 300 W · 3.15 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9455P — 48 cores / 96 threads · 300 W · 3.15 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9365 — 36 cores / 72 threads · 300 W · 3.4 GHz base · 192 MB cache · DDR5-6400AMD EPYC 9375F — 32 cores / 64 threads · 320 W · 3.8 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9355 — 32 cores / 64 threads · 280 W · 3.55 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9355P — 32 cores / 64 threads · 280 W · 3.55 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9335 — 32 cores / 64 threads · 210 W · 3 GHz base · 128 MB cache · DDR5-6400AMD EPYC 9275F — 24 cores / 48 threads · 320 W · 4.1 GHz base · 256 MB cache · DDR5-6400AMD EPYC 9255 — 24 cores / 48 threads · 200 W · 3.25 GHz base · 128 MB cache · DDR5-6400AMD EPYC 9175F — 16 cores / 32 threads · 320 W · 4.2 GHz base · 512 MB cache · DDR5-6400AMD EPYC 9135 — 16 cores / 32 threads · 200 W · 3.65 GHz base · 64 MB cache · DDR5-6400AMD EPYC 9115 — 16 cores / 32 threads · 125 W · 2.6 GHz base · 64 MB cache · DDR5-6400AMD EPYC 9015 — 8 cores / 16 threads · 125 W · 3.6 GHz base · 64 MB cache · DDR5-6400AMD EPYC 9754 — 128 cores / 256 threads · 360 W · 2.25 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9734 — 112 cores / 224 threads · 340 W · 2.2 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9654 — 96 cores / 192 threads · 360 W · 2.4 GHz base · 384 MB cache · DDR5-4800AMD EPYC 9654P — 96 cores / 192 threads · 360 W · 2.4 GHz base · 384 MB cache · DDR5-4800AMD EPYC 9634 — 84 cores / 168 threads · 290 W · 2.25 GHz base · 384 MB cache · DDR5-4800AMD EPYC 9554 — 64 cores / 128 threads · 360 W · 3.1 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9554P — 64 cores / 128 threads · 360 W · 3.1 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9534 — 64 cores / 128 threads · 280 W · 2.45 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9474F — 48 cores / 96 threads · 360 W · 3.6 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9454 — 48 cores / 96 threads · 290 W · 2.75 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9454P — 48 cores / 96 threads · 290 W · 2.75 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9374F — 32 cores / 64 threads · 320 W · 3.85 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9354 — 32 cores / 64 threads · 280 W · 3.25 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9354P — 32 cores / 64 threads · 280 W · 3.25 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9334 — 32 cores / 64 threads · 210 W · 2.7 GHz base · 128 MB cache · DDR5-4800AMD EPYC 9274F — 24 cores / 48 threads · 320 W · 4.05 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9224 — 24 cores / 48 threads · 200 W · 2.5 GHz base · 64 MB cache · DDR5-4800AMD EPYC 9254 — 24 cores / 48 threads · 200 W · 2.9 GHz base · 128 MB cache · DDR5-4800AMD EPYC 9174F — 16 cores / 32 threads · 320 W · 4.1 GHz base · 256 MB cache · DDR5-4800AMD EPYC 9124 — 16 cores / 32 threads · 200 W · 3 GHz base · 64 MB cache · DDR5-4800EPYC 9845160 cores · 2.4 W/core — top SKU and most efficient
AMD EPYC 9005 25AMD EPYC 9004 20Bubble size = L3 cache · hover a bubble for the full SKU

R7715: memory with every slot filled

16 GB384 GB32 GB768 GB64 GB1.5 TB96 GB2.3 TB128 GB3 TB256 GB6 TB24 slots · 24 per processor · each tick = one DIMM

SR655 V3: memory with every slot filled

16 GB192 GB32 GB384 GB64 GB768 GB96 GB1.1 TB128 GB1.5 TB256 GB3 TB12 slots · 12 per processor · each tick = one DIMM

R7715: drive bays

Front panel

40 × EDSFF NVMe at the front — 40 bays in total.

SAS/SATANVMeSAS/SATA + NVMe

SR655 V3: drive bays

Front panel

24 × 2.5" SAS/SATA at the front — 24 bays in total.

SAS/SATANVMeSAS/SATA + NVMe

R7715: power supplies

0500100015002000250030003500800 W Platinum — 100-240 VAC or 240 VDC; 60 mm800Platinum800 W Titanium — 100-240 VAC or 240 VDC; 60 mm800Titanium1100 W Platinum — 100-240 VAC (derated to 1050 W at 100-120 VAC) or 240 VDC; 60 mm1100Platinum1100 W Titanium — 100-240 VAC (derated to 1050 W at 100-120 VAC) or 240 VDC; 60 mm1100Titanium1400 W Telco (DC) — -48 to -60 VDC1400DC1500 W Titanium — 100-240 VAC (derated to 1050 W at 100-120 VAC) or 240 VDC; 60 mm1500Titanium1500 W Titanium — 277 VAC or 336 VDC HVDC; 60 mm1500Titanium1800 W Titanium — 200-240 VAC or 240 VDC mixed mode; 60 mm; C16; not available at November 2025 launch1800Titanium2400 W Titanium — 100-240 VAC or 240 VDC mixed mode; 73.5 mm; C192400Titanium3200 W Titanium — 200-240 VAC or 240 VDC mixed mode; 73.5 mm; C193200Titanium3200 W Titanium — 277 VAC or 336/366 VDC HVDC; 73.5 mm; APP/Saf-D-Grid3200TitaniumWatts · dashed line = output at 100–120 V low line
AC277 VAC / HVDC

SR655 V3: power supplies

050010001500200025003000750 W Platinum — AC input power - 80 PLUS Platinum efficiency; input 230V/115V; max quantity 2750Platinum750 W Titanium — AC input power - 80 PLUS Titanium efficiency; input 230V; max quantity 2750Titanium750 W Titanium — AC input power - 80 PLUS Titanium efficiency; input 230V; max quantity 2750Titanium1100 W n/a (DC input) — -48V DC input power; input -48V DC; max quantity 21100DC1100 W Platinum — AC input power - 80 PLUS Platinum efficiency; input 230V/115V; max quantity 21100Platinum1100 W Titanium — AC input power - 80 PLUS Titanium efficiency; input 230V; max quantity 21100Titanium1800 W Platinum — AC input power - 80 PLUS Platinum efficiency; input 230V; max quantity 21800Platinum1800 W Titanium — AC input power - 80 PLUS Titanium efficiency; input 230V; max quantity 21800Titanium2400 W Platinum — input 230V; max quantity 22400Platinum2600 W Titanium — AC input power - 80 PLUS Titanium efficiency; input 230V; max quantity 22600TitaniumWatts · dashed line = output at 100–120 V low line
AC−48 V DC
06 — Like for like

18 processors you can order in either

Both vendor documents list these parts, so a build can be matched across the two and the comparison comes down to the chassis: 0 more are exclusive to the R7715 and 27 to the SR655 V3.

ProcessorCoresTDP
AMD EPYC 9845160390 W
AMD EPYC 9825144390 W
AMD EPYC 9745128400 W
AMD EPYC 9655P96400 W
AMD EPYC 9555P64360 W
AMD EPYC 9575F64400 W
AMD EPYC 953564300 W
AMD EPYC 9475F48400 W
AMD EPYC 945548300 W
AMD EPYC 9375F32320 W
AMD EPYC 933532210 W
AMD EPYC 9355P32280 W
07 — Questions

R7715 vs SR655 V3, answered

Is the R7715 or the SR655 V3 the faster server?

Neither document publishes benchmark results, so this page compares what they do state. The R7715 lists 18 processors up to 160 cores at 400 W; the SR655 V3 lists 45 up to 160 cores at 400 W. Fully populated that is 160 cores against 160.

Which holds more memory?

The R7715 has 24 DIMM slots and a stated ceiling of 6 TB. The SR655 V3 has 12 and 3 TB.

Which takes more drives?

R7715: 40 bays across 10 documented layouts. SR655 V3: 40 across 24. Counts include rear and mid-chassis positions where the vendor documents them.

Can either take GPUs?

R7715: up to 6 accelerators, 4 double-wide cards listed. SR655 V3: up to 8, 7 double-wide listed.

Do they share any processors?

Yes — 18 processors appear in both documents, including the AMD EPYC 9845. That makes a like-for-like build possible on either server.

Where these figures come from. R7715: Dell PowerEdge R7715 Technical Guide (May 2026) (Dell document). SR655 V3: Lenovo ThinkSystem SR655 V3 Server Product Guide (publication date is not printed in the text export; guide contains 'New as of July 2026' notes) (Lenovo document). Each claim on this page is derived from those documents, checked page by page on the two data sheets, and carries no pricing.

Other comparisons in this class

R570 vs SR655 V3Dell vs LenovoR7615 vs SR655 V3Dell vs LenovoR7715 vs DL345 Gen11Dell vs HPER7715 vs DL345 Gen12Dell vs HPEDL340 Gen12 vs SR655 V3HPE vs LenovoDL340e Gen12 vs SR655 V3HPE vs LenovoDL345 Gen11 vs SR655 V3HPE vs LenovoDL345 Gen12 vs SR655 V3HPE vs Lenovo

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